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1999年在威宁县布置的马铃薯田间试验 ,目的是探索适当的氮磷钾配比和用量 ,为马铃薯平衡施肥提供依据。试验表明 ,氮磷钾与有机肥配合施用较农民习惯施肥有极显著的增产增收效益。配方施肥较农民习惯施肥可增产 6 .6 3t/ hm2 ,增幅 34.82 % ,肥料产出投入比达 5.17,增产增收效益十分显著。建议在相似的土壤条件下适宜的 N∶ P2 O5∶ K2 O为 10 0∶ 58∶ 14 4。
The potato field experiment in Weining County in 1999 was aimed at exploring the appropriate NPK fertilizers and their dosage to provide the basis for balanced fertilization of potatoes. Tests showed that the application of NPK and organic manures significantly increased the yield and income of farmers than the conventional fertilization. Recipe fertilization than peasants used to fertilization can increase 6 6 3t / hm2, an increase of 34.82%, fertilizer output ratio of up to 5.17, increase production and income efficiency is very significant. It is suggested that the suitable N: P2 O5: K2 O is 10 0:58:14 4 under similar soil conditions.